chore: add sample dictionary words (#26)

This PR adds the following few words to dictionary for testing
purposes..

- Concatenate
- Tuple
- Singleton
- Full Duplex

It also confirms a final directory name for the dictionary with
`browse`, this directory will be the path where all dictionary word will
be added to and read from... it will hereby mean that the path to a
dictionary word shall be `/browse/word`

### Changes Made

- Added for new `.mdx` files for each added word to the directory
`pages/browse`
- Modified the path to the dictionary directory at `dictionary` index in
`layouts/base.astro`; correcting it to `"../pages/browse/*.mdx"` from
`"../pages/word/*.mdx"`

📖

Author: babblebey

src/layouts/base.astro

@@ -5,7 +5,7 @@ import "../base.css";
 import { $dictionary } from "../stores/dictionary.js";
 
 const { pageTitle, class:list } = Astro.props;
-const dictionary = await Astro.glob("../pages/word/*.mdx");
+const dictionary = await Astro.glob("../pages/browse/*.mdx");
 
 $dictionary.set(dictionary);
 ---

src/pages/browse/concatenate.mdx

@@ -0,0 +1,6 @@
+---
+layout: ../../layouts/word.astro
+title: 'Concatenate'
+---
+
+Concatenate is a process of combining two or more strings into a single larger string. It's an important function in programming and computing because it allows you to store and combine multiple pieces of data when needed.

src/pages/browse/full-duplex.mdx

@@ -0,0 +1,10 @@
+---
+layout: ../../layouts/word.astro
+title: 'Full Duplex'
+---
+
+Full-duplex data transmission means that data can be transmitted in both directions on a signal carrier at the same time. 
+
+For example, on a local area network with a technology that has full-duplex transmission, one workstation can be sending data on the line while another workstation is receiving data. 
+
+Full-duplex transmission implies a bidirectional line that can move data in both directions simultaneously.

src/pages/browse/singleton.mdx

@@ -0,0 +1,8 @@
+---
+layout: ../../layouts/word.astro
+title: 'Singleton'
+---
+
+The Singleton Pattern is a design paradigm in object-oriented programming that restricts the instantiation of a class to a single object. This pattern ensures that only one instance of the class exists and provides a global point of access to it.
+
+## Example

src/pages/browse/tuple.mdx

@@ -0,0 +1,21 @@
+---
+layout: ../../layouts/word.astro
+title: 'Tuple'
+---
+
+A tuple is a data structure that is an immutable, or unchangeable, ordered sequence of elements. Because tuples are immutable, their values cannot be modified.
+
+As a general rule, tuples use less memory than a list or array.
+
+Tuples allows for slicing and indexing like lists, but do not have methods for deleting or changing any elements.
+
+## Example
+
+```python
+# creating a tuple 
+mySiblings = ('Susan', 'James', 'Bryan')
+
+# accessing an element within a tuple:
+
+mySiblings[2]
+```