docs: extract keymap cheatsheet into CHEATSHEET.md

lua/core/keymap.lua

@@ -145,9 +145,6 @@ vim.keymap.set("n", "<Leader>r", function()
     end
 end)
 
-vim.keymap.set("n", "]c", ":cn<CR>")
-vim.keymap.set("n", "[c", ":cp<CR>")
-
 vim.keymap.set("n", "<C-k>", vim.diagnostic.open_float)
 vim.keymap.set("n", "[d", function()
     vim.diagnostic.jump({ count = -1, float = true })
@@ -232,54 +229,3 @@ vim.keymap.set("n", "<leader>fd", vim.diagnostic.setloclist)
 vim.keymap.set("n", "<leader>fD", vim.diagnostic.setqflist)
 vim.keymap.set("n", "grt", vim.lsp.buf.type_definition)
 vim.keymap.set("n", "gd", vim.lsp.buf.definition)
-
--- Default bindings that are good to know:
--- insert mode:
---  <C-T>           - indent, see :h i_CTRL-T
---  <C-D>           - un-indent, see :h i_CTRL-D
--- normal mode:
---  H/M/L           - Jump to highest/middle/lowest line in window.
---  <count?><C-E>   - scroll window down <count> lines, see :h CTRL-E
---  <count?><C-Y>   - scroll window up <count> lines, see :h CTRL-Y
---  <C-A>           - Increment
---  <C-X>           - Decrement
---  <C-w>H          - Move window to the left
---  <C-w>J          - Move window down
---  <C-w>K          - Move window up
---  <C-w>L          - Move window to the right
---  gq{motion}      - format word-wrap of the line that {motion} moves over
---  {Visual}gq      - format word-wrap of the visually selected area
---  gqq             - format word-wrap of the current line
--- commands:
---  :make           - execute makeprg with given args, and put the output in
---                    quickfix list
---  :grep           - execute grepprg with given args, and put the results in
---                    quickfix list
---  :cex {expr}     - Create a quickfix list using the result of {expr} and
---                    jump to the first error. For example:
---                    :cex system('make')
---  :cgete {expr}   - same as :cex but don't jump to the first error
---  :copen          - open quickfix list
---  :cdo {cmd}      - execute {cmd} in each valid entry in the quickfix list.
---                    works like this:
---                      :cfirst
---                      :{cmd}
---                      :cnext
---                      :{cmd}
---                      etc.
---  :cfdo {cmd}     - same as :cdo but on each file in quickfix list
---  :cn             - go to the next error in quickfix list that includes a file name
---  :cp             - go to the previous error in quickfix list that includes a file name
---  :cc [num]       - go to the specified error in quickfix list
---  @:              - repeat last command
---  :s/foo/bar/     - substitute the first match of foo with bar in the current line
---  :s/foo/bar/g    - same as above but for all matches in the current line
---  :%s/foo/bar/g   - same as above, but for all lines in buffer
---  :%s/foo/bar/gc  - same as above but asking for confirmation on each match
---  :lua << EOF     - run a lua snippet using lua-heredoc syntax
---  local tbl = {1, 2, 3}
---  for k, v in ipairs(tbl) do
---    print(v)
---  end
---  EOF
---  :diffsplit <other-file> - open diff split