Update README.md with more detailed information about the project and how to contribute. Fix formatting and spelling errors.

README.md

@@ -30,7 +30,6 @@ Based on the [wikipedia dumps](https://dumps.wikimedia.org/). Please check this
 - revid: The revision ID of the page.
 - url: The URL of the page.
 - title: The title of the page.
-- origin_storage_id: The storage ID of the original page.
 - ignored: Whether the page is ignored.
 - created_at: The creation time of the page.
 - updated_at: The update time of the page.
@@ -40,7 +39,6 @@ Based on the [wikipedia dumps](https://dumps.wikimedia.org/). Please check this
 - id: A unique identifier for the chunk.
 - title: The title of the page.
 - url: The URL of the page.
-- snapshot: The snapshot of the page.
 - source_id: The source ID of the page.
 - chunk_index: The index of the chunk.
 - chunk_text: The text of the chunk.
@@ -62,7 +60,6 @@ CREATE TABLE IF NOT EXISTS ts_wikipedia_en (
     revid BIGINT NOT NULL,
     url VARCHAR NOT NULL,
     title VARCHAR NOT NULL DEFAULT '',
-    origin_storage_id VARCHAR(1024) NOT NULL DEFAULT '',
     ignored BOOLEAN NOT NULL DEFAULT FALSE,
     created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
     updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
@@ -72,7 +69,6 @@ CREATE TABLE IF NOT EXISTS ts_wikipedia_en_embed (
     id BIGSERIAL PRIMARY KEY,
     title VARCHAR NOT NULL,
     url VARCHAR NOT NULL,
-    snapshot VARCHAR NOT NULL,
     source_id BIGINT NOT NULL,
     chunk_index BIGINT NOT NULL,
     chunk_text VARCHAR NOT NULL,
@@ -88,9 +84,9 @@ CREATE TABLE IF NOT EXISTS ts_wikipedia_en_embed (
 
 ```sql
 \copy ts_wikipedia_en FROM 'data/meta/ts_wikipedia_en.csv' CSV HEADER;
-\copy ts_wikipedia_en_embed FROM 'data/chunks/ts_wikipedia_en_embed_0000000.csv' CSV HEADER;
-\copy ts_wikipedia_en_embed FROM 'data/chunks/ts_wikipedia_en_embed_0000001.csv' CSV HEADER;
-\copy ts_wikipedia_en_embed FROM 'data/chunks/ts_wikipedia_en_embed_0000002.csv' CSV HEADER;
+\copy ts_wikipedia_en_embed FROM 'data/chunks/0000000.csv' CSV HEADER;
+\copy ts_wikipedia_en_embed FROM 'data/chunks/0000001.csv' CSV HEADER;
+\copy ts_wikipedia_en_embed FROM 'data/chunks/0000002.csv' CSV HEADER;
 ...
 ```
 
@@ -98,9 +94,9 @@ CREATE TABLE IF NOT EXISTS ts_wikipedia_en_embed (
 
 ```sql
 copy ts_wikipedia_en FROM 'data/meta/ts_wikipedia_en.csv' CSV HEADER;
-copy ts_wikipedia_en_embed FROM 'data/chunks/ts_wikipedia_en_embed_0000000.csv' CSV HEADER;
-copy ts_wikipedia_en_embed FROM 'data/chunks/ts_wikipedia_en_embed_0000001.csv' CSV HEADER;
-copy ts_wikipedia_en_embed FROM 'data/chunks/ts_wikipedia_en_embed_0000002.csv' CSV HEADER;
+copy ts_wikipedia_en_embed FROM 'data/chunks/0000000.csv' CSV HEADER;
+copy ts_wikipedia_en_embed FROM 'data/chunks/0000001.csv' CSV HEADER;
+copy ts_wikipedia_en_embed FROM 'data/chunks/0000002.csv' CSV HEADER;
 ...
 ```
 
@@ -116,7 +112,6 @@ The `vector` column is a halfvec(768) column, which is a 16-bit half-precision v
 CREATE INDEX IF NOT EXISTS ts_wikipedia_en_revid_index ON ts_wikipedia_en (revid);
 CREATE INDEX IF NOT EXISTS ts_wikipedia_en_url_index ON ts_wikipedia_en (url);
 CREATE INDEX IF NOT EXISTS ts_wikipedia_en_title_index ON ts_wikipedia_en (title);
-CREATE INDEX IF NOT EXISTS ts_wikipedia_en_origin_storage_id_index ON ts_wikipedia_en (origin_storage_id);
 CREATE INDEX IF NOT EXISTS ts_wikipedia_en_ignored_index ON ts_wikipedia_en (ignored);
 CREATE INDEX IF NOT EXISTS ts_wikipedia_en_created_at_index ON ts_wikipedia_en (created_at);
 CREATE INDEX IF NOT EXISTS ts_wikipedia_en_updated_at_index ON ts_wikipedia_en (updated_at);