Prepare for releasing v3.0.0 (#165)

## Problem

Prepare for releasing Java SDK v3.0.0.

## Solution

Releasing a major version requires updating:
1. README
2. gradle.properties
3. CHANGELOG.md
4. Constants.java

## Type of Change

- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] This change requires a documentation update
- [ ] Infrastructure change (CI configs, etc)
- [X] Non-code change (docs, etc)
- [ ] None of the above: (explain here)

## Test Plan

No code is updated as a part of this change, integration tests should
run as expected.

Author: rohanshah18

CHANGELOG.md

@@ -2,6 +2,17 @@
 
 [comment]: <> (When bumping [pc:VERSION_LATEST_RELEASE] create a new entry below)
 ### Unreleased version
+### 3.0.0
+- Add support for imports
+  - start import
+  - list imports
+  - describe import
+  - cancel import
+- Add support for inference
+  - embed
+  - rerank
+- Generate code based on 2024-10 open-api spec
+
 ### 2.1.0
 - Add support to disable TLS for data plane operations
 

README.md

@@ -15,20 +15,20 @@ Maven:
 <dependency>
   <groupId>io.pinecone</groupId>
   <artifactId>pinecone-client</artifactId>
-  <version>2.0.0</version>
+  <version>3.0.0</version>
 </dependency>
 ```
 
 [comment]: <> (^ [pc:VERSION_LATEST_RELEASE])
 
 Gradle:
 ```
-implementation "io.pinecone:pinecone-client:2.0.0"
+implementation "io.pinecone:pinecone-client:3.0.0"
 ```
 
 [comment]: <> (^ [pc:VERSION_LATEST_RELEASE])
 
-Alternatively, you can use our standalone uberjar [pinecone-client-2.0.0-all.jar](https://repo1.maven.org/maven2/io/pinecone/pinecone-client/2.0.0/pinecone-client-2.0.0-all.jar), which bundles the Pinecone
+Alternatively, you can use our standalone uberjar [pinecone-client-3.0.0-all.jar](https://repo1.maven.org/maven2/io/pinecone/pinecone-client/3.0.0/pinecone-client-3.0.0-all.jar), which bundles the Pinecone
 SDK and all dependencies together. You can include this in your classpath like you do with any 3rd party JAR without
 having to obtain the *pinecone-client* dependencies separately.
 

gradle.properties

@@ -1 +1 @@
-pineconeClientVersion = 2.1.0
+pineconeClientVersion = 3.0.0

src/main/java/io/pinecone/commons/Constants.java

@@ -1,5 +1,5 @@
 package io.pinecone.commons;
 
 public class Constants {
-    public static final String pineconeClientVersion = "v2.1.0";
+    public static final String pineconeClientVersion = "v3.0.0";
 }