update validate-tooling-data for eliminate case insensitive languages

[Vishv0407]

What kind of change does this PR introduce?
Feature - Adds case-insensitive unique validation for language entries

Issue Number:

• Closes 🐛 Bug: Two JavaScript labels for filter on Tools page #1443
• Related to #___
• Others?

Screenshots/videos:
Forcefully made mistakes in the name of language,

Validator finds the mistake,

If relevant, did you update the documentation?

Summary
This PR introduces case-insensitive unique validation for language entries in the tooling data to solve several existing problems:

1. Inconsistent language casing across tools (e.g., "JavaScript" vs "javascript" vs "JAVASCRIPT")
2. Potential confusion for users seeing the same language listed multiple times

My solution:
Implements a custom AJV keyword caseInsensitiveUnique that:

• Detects and reports case-insensitive duplicates using set
• Provides clear error messages for easy fixes

           ajv.addKeyword({
              keyword: 'caseInsensitiveUnique',
              type: 'array',
              validate: function (schema, data) {
                if (!Array.isArray(data)) return false;
                
                const languagesSet = new Set();
                const languagesLowercaseSet = new Set();
                data.forEach((tool) => {
                  if (tool.languages) {
                    tool.languages.forEach((language) => {
                      languagesSet.add(language);
                      languagesLowercaseSet.add(language.toLowerCase());
                    });
                  }
                });
                if (languagesSet.size !== languagesLowercaseSet.size) {
                  console.error('Duplicate languages found');
                  const lowercaseMap = new Map();
                  languagesSet.forEach((language) => {
                    lowercaseMap.set(
                      language.toLowerCase(), 
                      (lowercaseMap.get(language.toLowerCase()) || 0) + 1
                    );
                  });
                  
                  lowercaseMap.forEach((value, key) => {
                    if (value > 1) {
                      console.log('Duplicate found for:', key);
                    }
                  });
                  validate.errors = [{
                    keyword: 'caseInsensitiveUnique',
                    message: 'array contains case-insensitive duplicates',
                    params: { keyword: 'caseInsensitiveUnique' }
                  }];
                  return false;
                }
                return true;
              }
            });

Does this PR introduce a breaking change?
✅ Yes

Impact:
This PR enforces case-insensitive uniqueness for language entries. Any existing tooling data that includes language names with inconsistent casing—such as "JavaScript" and "javascript"—will now fail validation. This change helps eliminate redundancy and confusion caused by duplicate entries with different letter cases.

Who is affected:
Tool maintainers and contributors who have added language entries with varying casing.

Migration Path:
Update your languages arrays to ensure that each language appears only once in a consistent format, preferably matching the casing defined in the schema enum. For example:

# ❌ Before
languages:
  - "JavaScript"
  - "javascript"
  - "Go"
  - "go"

# ✅ After
languages:
  - "JavaScript"
  - "Go"

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (219521e) to head (ac51230).

Additional details and impacted files

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  Lines          396       396           
  Branches       106       106           
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