feat: refactor file structure

spec/ansi_spec.lua

@@ -1,5 +1,5 @@
 describe('ansi parser', function()
-  local ansi = require('cp.ansi')
+  local ansi = require('cp.ui.ansi')
 
   describe('bytes_to_string', function()
     it('returns string as-is', function()
@@ -224,7 +224,6 @@ describe('ansi parser', function()
       ansi.setup_highlight_groups()
 
       local highlight = vim.api.nvim_get_hl(0, { name = 'CpAnsiRed' })
-      -- When 'NONE' is set, nvim_get_hl returns nil for that field
       assert.is_nil(highlight.fg)
 
       for i = 0, 15 do

spec/diff_spec.lua

@@ -4,7 +4,7 @@ describe('cp.diff', function()
 
   before_each(function()
     spec_helper.setup()
-    diff = require('cp.diff')
+    diff = require('cp.ui.diff')
   end)
 
   after_each(function()

spec/execute_spec.lua

@@ -6,7 +6,7 @@ describe('cp.execute', function()
 
   before_each(function()
     spec_helper.setup()
-    execute = require('cp.execute')
+    execute = require('cp.runner.execute')
     mock_system_calls = {}
     temp_files = {}
 

spec/extmark_spec.lua

@@ -4,7 +4,7 @@ describe('extmarks', function()
 
   before_each(function()
     spec_helper.setup()
-    highlight = require('cp.highlight')
+    highlight = require('cp.ui.highlight')
   end)
 
   after_each(function()

spec/highlight_spec.lua

@@ -4,7 +4,7 @@ describe('cp.highlight', function()
 
   before_each(function()
     spec_helper.setup()
-    highlight = require('cp.highlight')
+    highlight = require('cp.ui.highlight')
   end)
 
   after_each(function()

spec/run_render_spec.lua

@@ -1,5 +1,5 @@
 describe('cp.run_render', function()
-  local run_render = require('cp.run_render')
+  local run_render = require('cp.runner.run_render')
   local spec_helper = require('spec.spec_helper')
 
   before_each(function()

spec/run_spec.lua

@@ -1,5 +1,5 @@
 describe('run module', function()
-  local run = require('cp.run')
+  local run = require('cp.runner.run')
 
   describe('basic functionality', function()
     it('has required functions', function()