chore(refactor): update table class names used while parsing

## Details

Fixes collision with `render.md.table.Cell` in configuration. Now each
class used while parsing includes information about where it's nested
under, i.e. `render.md.table.row.Cell`.

Author: MeanderingProgrammer

doc/render-markdown.txt

@@ -1,4 +1,4 @@
-*render-markdown.txt*        For NVIM v0.11.6       Last change: 2026 March 07
+*render-markdown.txt*        For NVIM v0.11.6       Last change: 2026 March 08
 
 ==============================================================================
 Table of Contents                          *render-markdown-table-of-contents*

lua/render-markdown/health.lua

@@ -6,7 +6,7 @@ local state = require('render-markdown.state')
 local M = {}
 
 ---@private
-M.version = '8.11.15'
+M.version = '8.11.16'
 
 function M.check()
     M.start('versions')

lua/render-markdown/render/markdown/table.lua

@@ -10,9 +10,9 @@ local str = require('render-markdown.lib.str')
 
 ---@class render.md.table.Col
 ---@field width integer
----@field alignment render.md.table.Alignment
+---@field alignment render.md.table.col.Alignment
 
----@enum render.md.table.Alignment
+---@enum render.md.table.col.Alignment
 local Alignment = {
     left = 'left',
     right = 'right',
@@ -23,14 +23,14 @@ local Alignment = {
 ---@class render.md.table.Row
 ---@field node render.md.Node
 ---@field pipes render.md.Node[]
----@field cells render.md.table.Cell[]
+---@field cells render.md.table.row.Cell[]
 
----@class render.md.table.Cell
+---@class render.md.table.row.Cell
 ---@field node render.md.Node
 ---@field width integer
----@field space render.md.table.Space
+---@field space render.md.table.cell.Space
 
----@class render.md.table.Space
+---@class render.md.table.cell.Space
 ---@field left integer
 ---@field right integer
 
@@ -143,7 +143,7 @@ end
 
 ---@private
 ---@param node render.md.Node
----@return render.md.table.Alignment
+---@return render.md.table.col.Alignment
 function Render.alignment(node)
     local left = node:child('pipe_table_align_left')
     local right = node:child('pipe_table_align_right')
@@ -167,7 +167,7 @@ function Render:parse_row(node, num_cols)
     if not parts or #parts.cells ~= num_cols then
         return nil
     end
-    local cells = {} ---@type render.md.table.Cell[]
+    local cells = {} ---@type render.md.table.row.Cell[]
     for i, cell in ipairs(parts.cells) do
         -- account for double width glyphs by replacing cell range with width
         local start_col = parts.pipes[i].end_col