docs: Add title for HTTP api docs

[w1am]

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[alexeyzimarev]

@w1am can you set the dir order frontmatter for the HTTP API section to 99 so it shows last?

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[w1am]

@w1am can you set the dir order frontmatter for the HTTP API section to 99 so it shows last?

It was already set, but ignored because we are using a structured sidebar. The way the docs files were set up in the legacy docs is not compatible with what we configured in the documentation. The sidebar.cjs file in those legacy docs is ignored (but it's still useful for previewing the docs locally when running them in the same branch)

So I kept the title, removed the order as well as some auto generated header in http api reference:

For legacy versions of the database, I will define the structure of the sidebar manually using this config:

    // The way these docs were setup in server v22.10 and v5 are not compatible with the new sidebar structure. 
    "/server/v22.10/": [
      "introduction",
      "installation",
      "configuration",
      "streams",
      "indexes",
      "projections",
      "persistent-subscriptions",
      "operations",
      "diagnostics",
      "networking",
      "cluster",
      "security",
      "upgrade-guide",
      "release-notes",
      "release-schedule",
      {
        text: "HTTP API",
        children: [
          "http-api/introduction.md",
          "http-api/security.md",
          "http-api/persistent.md",
          "http-api/projections.md",
          "http-api/optional-http-headers.md",
          "http-api/api.md"
        ],
        collapsible: true,
      }
    ],
    "/server/v5/": [
      "introduction",
      "installation",
      "configuration",
      "security",
      "networking",
      "cluster",
      "server-settings",
      "admin-ui",
      "indexes",
      "projections",
      "persistent-subscriptions",
      "operations",
      "diagnostics",
      {
        text: "HTTP API",
        children: [
          "http-api/introduction.md",
          "http-api/security.md",
          "http-api/persistent.md",
          "http-api/projections.md",
          "http-api/optional-http-headers.md",
          "http-api/api.md"
        ],
        collapsible: true,
      }
    ],

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[alexeyzimarev]

Looks good