Feat: Filtering Problem List using local files.

[jessedoka]

Hey, just wanted to add this feature, which is basically able to filter the problem list using both text and JSON files.

For example:

list.json

# My LeetCode Study List
two-sum
4sum|arrays,hash-table
longest-palindromic-substring|dynamic-programming

list.txt

{
  "dynamic-programming": [
    "longest-palindromic-substring",
    "coin-change"
  ],
  "arrays": [
    "two-sum",
    "4sum"
  ]
}

Basic Use:

:Leet custom file=my_list.txt

With additional Filters

:Leet custom file=my_list.txt filter=difficulty difficulty=medium
:Leet custom file=my_list.txt filter=status status=notac

Proof that is works.
Screencast from 2024-11-20 22-10-27.webm

(copilot summary below)

New functionality for custom list filtering:

• lua/leetcode/cache/problemlist.lua: Added parse_custom_list function to parse custom list files and filter_by_custom_list function to filter problems based on the custom list. Also added Problemlist.filter_by_file method to integrate these functions.

Command structure updates:

• lua/leetcode/command/arguments.lua: Added arguments.list_custom to define the structure for custom list command arguments, including file and filter options.
• lua/leetcode/command/init.lua: Added cmd.custom_list function to handle the new custom list command and integrated it into the command list with cmd.commands.custom. [1] [2]

[jessedoka]

Here is neetcode 150 if you want to test it yourself.
neetcode.txt