new query param features, fixes

also added README

README.md

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+# Makoto Markdown to HTML
+The Makoto parser converts markdown to HTML, powered by several hundred lines of spaghetti code. Specifically, it is a state machine (I think) that processes the markdown character by character.
+
+Makoto uses the MIT license.
+
+## Web Editor
+A web markdown editor (output in HTML, of course), is available at [makoto.prussia.dev](https://makoto.prussia.dev) or [makoto.pages.dev](https://makoto.pages.dev).
+
+### Query Params
+The web editor features various query params.
+
+- `help`: if "true", will display a quick intro to Makoto-flavoured markdown
+- `save`: if "true", will save the user inputted markdown to local storage, and will retrieve any existing saved text from local storage
+- `ignore`: if "all", all warnings will be ignored. Else, it can be a CSV (comma separated values) of warning types to ignore
+
+Example: [https://makoto.prussia.dev/?help=true&ignore=unknown-language,empty-link](https://makoto.prussia.dev/?help=true&ignore=unknown-language,empty-link)
+
+## HTML Output
+Some example CSS to style the HTML output can be found in `styles/makoto.css`.
+
+- Headings are given automatically generated ids ('header-0', 'header-1' etc) so url anchors (https://example.com/blog#header-1) are possible
+- Newlines will be put only after headings, paragraphs, and horizontal rules, all others will not be in final output (exceptions: no newlines in the last line, and newlines in code blocks are preserved)
+- Spaces at the beginning of the line are normally cut off in html, so spaces will be replaced with the html entity for spaces (  ) at the beginning of the line in code blocks
+- Lines in code blocks will be split with <br>s
+- If a language for the code block is provided, the parser will add a css class `code-<language name>` to the resulting code block div (which btw has class `code-block`)
+
+## Notable Differences From Standard Markdown
+- Only one newline between text is needed for a new paragraph, not two
+- Superscripts are supported! "^1^" become "<sup>1</sup>". Use these for footnotes too, I'm not implementing those
+- Underlined headers are not supported, just use a header and a horizontal rule
+- Nested blockquotes and lists won't work
+- The first row of a table will be assumed to be the header row, and don't bother with a row of dashes after it.
+- Also, the pipe ("|") in tables is mandatory at the end of the row, otherwise weird things will happen
+- Bold, italic, and other elements are not supported in tables
+
+## List of Warning Types
+- `unknown-language`
+- `image-incomplete`
+- `link-incomplete`
+- `italic-not-closed`
+- `bold-not-closed`
+- `superscript-not-closed`
+- `blockquote-broken`
+- `code-block-not-closed`
+- `unordered-list-broken`
+- `code-snippet-not-closed`
+- `too-much-header`
+- `heading-broken`
+- `horizontal-rule-broken`
+- `missing-image-alt`
+- `empty-link`
+- `weird-href`