renamed misc -> tools

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diff --git a/src/misc/fish.md b/src/misc/fish.md
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-# fish(1)
-
-## Quick Info
-Fish initialization file `~/.config/fish/config.fish`
-
-Switch between different key bindings:
-- `fish_default_key_bindings` to use default key bindings
-- `fish_vi_key_bindings` to use vi key bindings
-
-## Variables
-Available scopes
-- `local` variable local to a block
-- `global` variable global to shell instance
-- `universal` variable universal to all shell instances + preserved across
-  shell restart
-
-### Set/Unset Variables
-```text
-set <name> [<values>]
-    -l  local scope
-    -g  global scope
-    -U  universal scope
-    -e  erase variable
-    -S  show verbose info
-    -x  export to ENV
-    -u  unexport from ENV
-```
-
-### Lists
-In `fish` all variables are lists (start with index `1`, but lists can't
-contain lists.
-```text
-set foo a b c d
-
-echo $foo[1]      # a
-echo $foo[-1]     # d
-echo $foo[2..3]   # b c
-echo $foo[1 3]    # a c
-```
-
-`$` can be seen as dereference operator.
-```text
-set foo a; set a 1337
-echo $$foo  # outputs 1337
-```
-
-Cartesian product.
-```text
-echo file.{h,cc}
-# file.h file.cc
-
-echo {a,b}{1,2}
-# a1 b1 b2
-```
-
-### Special Variables (Lists)
-```text
-$status      # exit code of last command
-$pipestatus  # list of exit codes of pipe chain
-
-$CMD_DURATION   # runtime of last command in ms
-```
-
-#### `*PATH`
-Lists ending with `PATH` are automatically split at `:` when used and joined
-with `:` when exported to the environment.
-```text
-set -x BLA_PATH a:b:c:d
-echo $BLA_PATH              # a b c d
-env | grep BLA_PATH         # BLA_PATH=a:b:c:d
-```
-
-## Command Handling
-```text
-# sub-commands are not run in quotes
-echo "ls output: "(ls)
-```
-
-### I/O redirection
-```text
-# 'noclobber', fail if 'log' already exists
-echo foo >? log
-```
-
-## Control Flow
-### `if` / `else`
-```text
-if grep foo bar
-    # do sth
-else if grep foobar bar
-    # do sth else
-else
-    # do sth else
-end
-```
-
-### `switch`
-```text
-switch (echo foo)
-case 'foo*'
-    # do start with foo
-case bar dudel
-    # do bar and dudel
-case '*'
-    # do else
-end
-```
-
-### `while` Loop
-```text
-while true
-    echo foo
-end
-```
-
-### `for` Loop
-```text
-for f in (ls)
-    echo $f
-end
-```
-
-## Functions
-Function arguments are passed via `$argv` list.
-```text
-function fn_foo
-    echo $argv
-end
-```
-### Autoloading
-When running a command fish attempts to autoload a function. The shell looks
-for `<cmd>.fish` in the locations defined by `$fish_function_path` and loads
-the function lazily if found.
-
-This is the preferred way over monolithically defining all functions in a
-startup script.
-
-### Helper
-```text
-functions         # list al functions
-functions foo     # describe function 'foo'
-functions -e foo  # erase function 'foo'
-
-funced foo        # edit function 'foo'
-                  # '-e vim' to edit in vim
-```
-
-## Prompt
-The prompt is defined by the output of the `fish_prompt` function.
-```text
-function fish_prompt
-    set -l cmd_ret
-    echo "> "(pwd) $cmd_ret" "
-end
-```
-> Use `set_color` to manipulate terminal colors.
-
-
-## Useful Builtins
-```text
-# history
-history search <str>   # search history for <str>
-history merge          # merge histories from fish sessions
-
-# list
-count $var            # count elements in list
-
-# string
-string split SEP STRING
-```
-
-## Keymaps
-```text
-  Shift-Tab ........... tab-completion with search
-  Alt-Up / Alt-Down ... search history with token under the cursor
-  Alt-l ............... list content of dir under cursor
-  Alt-p ............... append '2>&1 | less;' to current cmdline
-```
-
-## Debug
-```text
-  status print-stack-trace .. prints function stacktrace (can be used in scripts)
-  breakpoint ................ halt script execution and gives shell (C-d | exit
-                              to continue)
-```